Novel Rogowski coil with no positional deviation

Abstract

A novel Rogowski coil with no positional deviation comprises an epoxy resin framework, Rogowski coil secondary lines and six ultra-crystalline small iron cores, wherein the Rogowski coil secondary lines are wound outside the epoxy resin framework, wires are wound around the ultra-crystalline small iron cores to form small coils, the small coils formed from the six ultra-crystalline small iron cores are uniformly fixed in the epoxy resin framework to form a Rogowski coil primary conductor and are connected in series with the Rogowski coil secondary lines wound around the epoxy resin framework, and a position error of the primary conductor is fundamentally prevented by the six small coils which are uniformly arranged so as to form the novel Rogowski coil with no positional deviation. During the installation process, the novel Rogowski coil is free from the position influence of the primary conductor and can be installed at an arbitrary position, the position error of the primary conductor is fundamentally prevented, and the novel Rogowski coil is simple to process and is high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of transformers used as measurement and protection equipment in power systems, in particular to a new Rogowski coil without position deviation that can completely eliminate the position deviation error caused by the different positions of the inner hole of the primary conductor. Background technique [0002] In the development of the country's smart grid, electronic transformers are one of the key components of primary equipment, and electronic current transformers for metering and protection generally use low-power coils (small iron cores are traditional electromagnetic mutual inductors) Although the development of the device has certain advantages, it cannot eliminate the phenomenon of magnetic saturation and has a narrow frequency band) and Rogowski air-core coils. Rogowski hollow coils have many advantages: 1. Applicable to current testing ranging from mA to MegaA; 2. Good linearity; 3. Wide frequency ra...

AI Technical Summary

Problems solved by technology

Because it has many advantages, the advantages are obvious. During the processing of Rogowski coils, due to its principle, the position of the primary conductor has a great influence on its secondary error. The wire method, the PCB printed circuit board method, etc., these methods are not ideal, and cannot meet the 0.2S level requirements, and the structure and method of the new Rogowski coil can completely eliminate position errors, and it is easy to meet the 0.2S level accuracy requirements

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